New gems take a bit longer than existing gems because gemcutter
takes a while to update the index. Usually it takes an hour for an
updated gem to pop up, but I think in the case of newly published
names it can take up to a day.

Let us know if it's still not up by tomorrow.

Also, if you want to write a gemcutter post-push hook service
thing so that gems get updated right away, we'd love to pull that
in :)